The infrared remote control transmitting circuit uses infrared light emitting diodes to transmit modulated infrared light waves; The infrared receiving circuit consists of an infrared receiving diode, a triode or a silicon photovoltaic cell, and converts the infrared light emitted by the infrared emitter into corresponding electrical signals, and sends them to the post-amplifier. The most widely used is the home appliance remote control. At present, An Ruichuang infrared remote controller is widely used in the home appliance remote controller market. The schematic diagram of this infrared remote controller is as follows: